> On Jan 20, 2016, at 06:45 , Jared Mauch <ja...@puck.nether.net> wrote:
>
>>
>> On Jan 20, 2016, at 9:31 AM, Job Snijders <j...@instituut.net> wrote:
>>
>> On Wed, Jan 20, 2016 at 11:13:41PM +0900, Randy Bush wrote:
>>>> I propose the following axiom: the greater the distance over which a
>>>> packet is forwarded, the less likely it is to be an IPv6 packet.
>>>
>>> that is a hypothesis not an axiom [...]
>>
>> Thanks.
>>
>>> but an interesting hypothesis. how do you propose to test it?
>>
>> We could assert that the TTL is an indication of distance traveled.
>>
>> Maybe one should record the TTL and Address Family of all packets
>> received from the internet ('inbound') at the next NANOG or IETF?
>
> One could likely just watch the traffic from CPE at a home of any
> DS user and track the TTLs there.
>
> The problem of course is networks that do not do TTL decrement, or
> are doing 6PE over an IPv4 only core. It makes this a less scientific
> study IMHO.
I think that’s actually in the noise since we are using TTL as a proxy
for distance traveled. The networks you are describing are by and large
not international or even continental transit networks.
Owen
